scholarly journals A Matrix-Free Preconditioner for Sparse Symmetric Positive Definite Systems and Least-Squares Problems

2013 ◽  
Vol 35 (1) ◽  
pp. A192-A211 ◽  
Author(s):  
Stefania Bellavia ◽  
Jacek Gondzio ◽  
Benedetta Morini
Keyword(s):  
Least Squares ◽  
Positive Definite ◽  
Least Squares Problems ◽  
Symmetric Positive Definite ◽  
Matrix Free

scholarly journals Alternative structured spectral gradient algorithms for solving nonlinear least-squares problems

Heliyon ◽  
2021 ◽  
pp. e07499
Author(s):  
Mahmoud Muhammad Yahaya ◽  
Poom Kumam ◽  
Aliyu Muhammed Awwal ◽  
Sani Aji
Keyword(s):  
Least Squares ◽  
Nonlinear Least Squares ◽  
Least Squares Problems ◽  
Gradient Algorithms
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